Rock-drill.



A. M. BECKER- ROCK DRILL.

APPLICATION FILED DEC. 18. m3.

1 ,1 83,827. Patented May 16, 1916.

Witnesses. lnvento AUGUST M. BECKER, 0F TORONTO, ONTARIO, CANADA;

ROCK-DRILL.

Specification of Letters Patent.

Patented May 16, 1916.

Application filed'lDecember 18, 1913. SeriaINO. 807,426.

To all whom it may concern:

Be it known that I, AUGUST'M. BECKER, a citizen of the United States of America, and resident of the city of Toronto, county of York, Province of Ontario, in the Dominion of Canada, have invented certain new and useful Improvements in Rock- Drills, as described in the following specification and illustrated in the accompanying drawings, that form part of the same.

The principal objects of the invention are, to efiect a saving of time and labor and to obviate many ofthe difficulties in manual rock drilling operations and to devise a drilling rig which may be operated with ease and precision by one man and the work accomplished in a muchmore efi'ective manner than by two men in the ordinary'manner of manual drilling.

A further object is to provide a device which is very compact and may be easily carried from place to place, thus providing a device which is particularly adaptable to prospecting mining.

A still further object is to devise a rig which has great fiexibility'of adjustment and is of a simple and durable construction.

The principal feature of the invention consists in the novel construction and arrangement of parts, whereby the drill is held in the desired position to be struck by the sledge and whereby it is rotated by the operator after each stroke of the hammer.

In the drawings, Figure 1 is a perspective view of the invention set up ready for use. scale. Fig. 3 is an enlarged perspective detail of the drill holdingfland ratchet rotating parts shown separated to disclose the details of their construction.

Like numerals of reference indicate cor- I responding parts in each figure.

Referring to the drawings,1 is a short bar here shown formed with flattened ends 2 to which are pivotally secured the legs"3,said

legs having pointed extremities to form a gri on the. rock or place which is to be dri led.

4 is a yoke shaped member having the collar ends 5 encircling the bar 1 and pivoted thereon. I

6 is a leg extending outwardly from the yoke and'formin'ga third leg support also preferably pointed at the end.

' 7 are weights secured to the legs 3 and 6 Fig. 2 is a plan view on a reduced.

- crating.

8 isa longitudinally split sleeve encir cling the rod 1 between the collars of the yoke 4 and adapted to be clamped thereon 1n any deslred position, suitable bolts 9 extieriisding therethrough across the longitudinal s 1 a 1O is a semi-cylindrical member formed lntegral with the upper half of the split sleeve 8 arranged centrally of its length having a central hole .11 therethrough and 2. central boss 12' around which are formed a plurality of ratchet teeth 13. 5

14: are dove tailed grooves formed in the fiat face 15 of the member 10 open at the top and tapering toward the bottom.

16 is a semi-cylindrical member of corre-- sponding shape to the member 10 adapted to be fitted to the face 15 thereof and formed with dove-tailed rib projections 17 adapted to fit thegrooves 14. When the two semicylindrical portions arefitted together they present a cylindrical member with a ratchet lower side of the ring l8is formed with a central circular recess'2O to receive the upwardly extending boss of the members 10 and 16 and a row of ratchet teeth 21 engaging the teeth 13. A boss 22 projectsupwardly from the center of the ratchet ring 18 and a row of ratchet teeth 23 is formed around the boss.

24 is a semi-circular stirrup 'pivotally secured to one of the half sections of the ring 18and' adapted to extend around the other half, a locking screw 25 being threaded through the center thereof to engage the outer sideof the encircled member to draw which is secured a spiral spring 32. The lower end of the spring 32 is secured in a hole 33 in one end of the bar 1.

34 is a spiral spring secured .in' a hole 35 in the opposite end of the bar 1 and secured at its upper end to an eye 36 secured to the under side of the arm 29.

I 37 are bolts extending laterally from the ring 27 and 38 are spiral springs secured to said bolts and extending downwardly, the lower ends being secured to projecting hook members 39 secured to the split sleeve 8. The springs'38 hold the loose ratchet rings in operating engagement the one with the other and. the lower ring in engagement with the lower rigid ratchet member on the split sleeve 8.

In the operation of this device, the divided ratchet members are separated as shown in Fig. 3. The shank of the drill is inserted between the halves of the ring 18 and the stirrup. member 2 1 is swung over the top of the drill andthe membersclamped together. The drill is held from turning in the ring 18 owing tothe shape of the receiving orifice. The drill shankis then placed in the half hole 11 inthe member 10 and the member 16 is then. dropped into'place, the dovetailed; ribs-17 entering the grooves 14. The upper ring 27 is then placed over the boss 22 onthe ring '18 and the springs connected as described, A chain 40 connected to the eye'36 in the arm 29 is secured at its opposite end'to the upper end of the leg 6 holding the springs 32 and 84 slightly in tension. 1 41 is afstrap' secured to the outer end' of the arm 29. 7 When the device is thus assembled the legs are setin the desired position and the sleeve 8 adjusted to give the desired angle to the drill. The operator secures theloose end of the strap 41 around hisleg just below the knee, the length of the strap being adjusted to allow him to stand therequired distance from the rig in order to swing his sledge. In swinging the sledge backward for the blow the operator straightens the knee and thus pulls on the strap thereby swinging the arm 29 against the pull of the springs 32. and 34 and through the engagement of the ratchet teeth of the ring 28 and 18 turns the drill a part revolution. As the blow-is struck, the knee bends forward thus loosening the strap and the springs 32jand as swing the arm back to the original position, the ratchet'ring' 27 slipping back over the teeth. of the ring 18 and the ring 18 being held from return by the engagement of the lower teeth with the teeth'13. 1 i 3' The drill may be clamped as tightly as desired but not so tight that it will notdrive freely but the friction is sufiicient to grip the drill andlift it clear of the bottom of the hole as the ratchet teeth rise. These .teeth are fairlyfhigh. of pitch so that the head of the drill is liftedv free of the loose borings. The action of the device is thus perfectly free.

It will be understood from this description thatthe drill will be positively held at the desired angle and rotated uniformly and the work will be far more effective than when the drill is manually held.

The device is small and compact and'may be readily carried where heavier drilling apparatus is impossible and it may be used GXtGDSlVGlY'IlOt only in surface work but in workingdrifts and it may be placed where it would be impossible for a man tohold a drill.

In setting the device for working in drifts it maybe found necessary to dispense with the leg supports. In such cases the bar 1 will be supported in any suitable manner to hold the other members in place.

l/Vhat I'claim as my invention is I 1. A drilling rig, comprising, a stand, a stationary member supported on said stand and loosely encircling the drill and having a circular ratchet top, 'a'cylindrical drill holder formed of two half sections adapted to slidably and non-rotatively encircle the drill, a semi-circular stirrup member pivotally secured to one ofthe half sections of the drill holder and adapted to extend around the other half -and'carrying a lock ing screw in the center thereof, a circular ratchet member loosely encircling the drill and engaging-the upper ratchet face of the drill holder, and means for holding said ratc'het'members in operative engagement.

2. A drilling rig, comprising a stand, an upright cylindrical member formed in two halves one of which is secured to said stand and formed with longitudinal dovetail grooves in the flat face and the other half is formed with dovetail ribs adapted to fit said grooves, said cylindrical member having a central circular hole therethrough and ratchet teeth in the top face, a ratchet ring slidably and nonrotatively engaging the drill and having the teeth on its unclerface engaging the teeth on said cylindrical member, and'aratchet ring adapted to manually rotate said drill holding ring.

Signed at the city of Toronto, Ontario, Canada, this 4th day of December,1913.

aueusr M. BECKER Witnesses: i

' D. S. TORELL, E. HERON.

Copies otthis patent may be obtained for five cents each, by addre ssing the Commissioner of Patents,

" Y Washington, 110." 

